S. Parker, Extra Heavy Duty, Solid Steel, With Weather Resistant, Zinc Plated Finish, Barrel Sliding Bolt (5" Inch) Choose from 2 sizes, 8" or 5". Can be installed onto the push side or pull side of the door. For right hand and left hand doors. A padlock can be used to lock the slidebolt in the closed position. Mounting and fastening hardware includes only through bolts and screws for wood doors and wood frames. We manufacture and include self drilling screws for steel doors and steel frames. (see the self drilling screws in the pictures above).